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Mineralpedia Details for Malhmoodite

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Malhmoodite

Malhmoodite

Commonly, and initially, misspelled Mahlmoodite, this mineral is named for Bertha K. Malhmood who was an Analytical Assistant at the United States Geological Survey. Malhmoodite is a rare mineral that occurs only in two localities: at the Wilson Springs Union Carbide mine in Arkansas, USA and in Kerriack Cove in Cornwall, England. It occurs as Wilson Springs as a secondary mineral in vugs within alkalic igneous rocks and at Kerriack Cove in a mineralized fissure vein.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/mahlmoodite.pdf

Formula
Fe2+Zr(PO4)2ยท4H2
Crystal System
Monoclinic 
Cleavage
Good, None, None 
Luster
Silky 
Color
cream white 
Streak
white 
Class
Monoclinic - Prismatic 
Hardness
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Mindat
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Malhmoodite from Union Carbide mine, Wilson Springs, Garland Co., Arkansas, United States

Malhmoodite
            from Union Carbide mine, Wilson Springs, Garland Co., Arkansas, United States

This specimen has at least two creamy white spheres to about 0.3mm in the crevices between Diopside matrix.

Click thumbnail images for larger view.

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